/Engine/Source/Runtime/Core/Public/Misc/FileHelper.h
Load a text file to anFString. Supports all combination of ANSI/Unicode files and platforms.
static bool LoadFileToString ( [FString](API\Runtime\Core\Containers\FString) & Result, const TCHAR * Filename, [EHashOptions](API\Runtime\Core\Misc\FFileHelper\EHashOptions) VerifyFlags, uint32 ReadFlags )